[sdiy] noise gate?

[Roy J. Tellason]

On Tuesday 06 July 2004 11:16 am, john mahoney wrote:
> ----- Original Message -----
> From: "Roy J. Tellason" <rtellason at blazenet.net>
>
> > Anybody got a schematic for a simple noise gate circuit?  I'd like
> > something that would be adaptable to providing a logic output when a 
> > signal (say from a mic) exceeded a certain level...

> I don't have a schematic, but all you need to do is rectify the audio and
> run that DC signal into a comparator. The other comparator input is your
> threshold voltage, which you will want to be adjustable.
>
> The comparator output is the gate signal.

Sounds pretty reasonable to me...

I could probably even use up a 741 or something for that "comparator" 
function...	:-)